Cf. https://www.inaturalist.org/pages/responses#multiple
Web User: Hi, welcome to iNaturalist! Looks like you’ve observed a few different species in the photos here. Rather than adding several photos of different species to a single observation, please put each in its own observation. You can add multiple photos to an observation when they are each photos of the same thing. A quick way to fix this observation is to use the duplicate feature. In the upper right corner of the observation page, click the downward arrow next to “Edit” and choose “Duplicate.” Then identify the duplicate observation as the organism in your second photo and uncheck the checkboxes next to the other photos. Then come back to this first observation, click “Edit,” and remove the extra photos. Please make a comment if you split the different organisms, so I can update my ID. Thank you.
Mobile User: Hi, welcome to iNaturalist! Looks like you’ve observed a few different species in the photos here. Rather than adding several photos of different species to a single observation, please put each in its own observation. You can add multiple photos to an observation when they are each photos of the same thing. All of the photos should be saved in the photo gallery on your device, so you can use the app to create a new observation for each type of organism you photographed. Be sure to edit this observation to remove the extra photos. Please make a comment if you split the different organisms, so I can update my ID. Thank you.
Either, with tutorial link: Looks like you’ve observed a few different species in the photos here. Each species should be on its own separate observation. There are some tips for splitting the observation up here: https://forum.inaturalist.org/t/how-to-fix-your-observation-with-photos-of-multiple-species/15096